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extern crate unicode_segmentation;
use self::unicode_segmentation::UnicodeSegmentation;
fn numerical_string_key(s : &String) -> Vec<i32> {
let mut k : Vec<i32> = Vec::with_capacity(s.len());
let mut current_number : i32 = 0;
let mut in_a_number = false;
for graphem in UnicodeSegmentation::graphemes(&**s, true) {
let chars : Vec<char> = graphem.chars().collect();
let size = chars.len();
if size == 0 {
k.push(0);
continue;
}
match chars[0].to_digit(10) {
Some(d) if size == 1 => {
in_a_number = true;
current_number = current_number * 10 + d as i32;
},
_ => {
if in_a_number {
k.push(current_number);
current_number = 0;
}
in_a_number = false;
k.push(chars.iter().fold(0, |sum, ch| sum + *ch as i32));
},
};
}
if in_a_number {
k.push(current_number);
}
k
}
pub fn sort_vec(v : &mut Vec<String>) {
v.sort_by_key(numerical_string_key);
}